I just replaced an old D-Link DI-624S router (two of the ports had died) with a DIR-825. I have several PCs and a few other devices in the home network. The router is connected to a cable modem through which I have a broadband internet connection.
With the new router, PCs connected by cable connect fine and have access to the internet. iPads connect to the wireless connection without difficulty and have internet access. An old Sony Vaio running Vista Business connects through the wireless link and has internet access and a new Acer desktop using a D-Link USB wireless device connects through the wireless link and has internet access.
I have two PCs that can see the wireless connection to the router, one is a Vista desktop using a USB wireless link the other is a new Windows 7 Toshiba laptop using its built in wireless connection. Both allow me to connect to the router but they display the connection as a Public Unidentified Network and only allow local access. Nothing I can do will allow them to be connected with internet access. I've tried changing the Public status to Private on the Vista machine but it reverts to Public more or less straight away.
All these machines were connected to the old router without difficulty and wireless access was trouble free. Any ideas what's going on. All I've changed is the router and the password. I had to choose a longer password for the new router than the old one used. Even the network name is the same as before.
If all the PCs couldn't connect I'd find it easier to understand but some being able to and some not seems very odd.